1 | #!/usr/bin/env python3 |
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2 | |||
3 | """Healthchecker for exabgp. |
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4 | |||
5 | This program is to be used as a process for exabgp. It will announce |
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6 | some VIP depending on the state of a check whose a third-party program |
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7 | wrapped by this program. |
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8 | |||
9 | To use, declare this program as a process in your |
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10 | :file:`/etc/exabgp/exabgp.conf`:: |
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11 | |||
12 | neighbor 192.0.2.1 { |
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13 | router-id 192.0.2.2; |
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14 | local-as 64496; |
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15 | peer-as 64497; |
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16 | } |
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17 | process watch-haproxy { |
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18 | run python -m exabgp healthcheck --cmd "curl -sf http://127.0.0.1/healthcheck" --label haproxy; |
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19 | } |
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20 | process watch-mysql { |
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21 | run python -m exabgp healthcheck --cmd "mysql -u check -e 'SELECT 1'" --label mysql; |
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22 | } |
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23 | |||
24 | Use :option:`--help` to get options accepted by this program. A |
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25 | configuration file is also possible. Such a configuration file looks |
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26 | like this:: |
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27 | |||
28 | debug |
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29 | name = haproxy |
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30 | interval = 10 |
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31 | fast-interval = 1 |
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32 | command = curl -sf http://127.0.0.1/healthcheck |
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33 | |||
34 | The left-part of each line is the corresponding long option. |
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35 | |||
36 | When using label for loopback selection, the provided value should |
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37 | match the beginning of the label without the interface prefix. In the |
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38 | example above, this means that you should have addresses on lo |
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39 | labelled ``lo:haproxy1``, ``lo:haproxy2``, etc. |
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40 | |||
41 | """ |
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42 | |||
43 | import sys |
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44 | import os |
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45 | import subprocess |
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46 | import re |
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47 | import logging |
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48 | import logging.handlers |
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49 | import argparse |
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50 | import signal |
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51 | import time |
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52 | import collections |
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53 | |||
54 | from ipaddress import ip_network |
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55 | from ipaddress import ip_address |
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56 | |||
57 | |||
58 | logger = logging.getLogger("healthcheck") |
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59 | |||
60 | |||
61 | def enum(*sequential): |
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62 | """Create a simple enumeration.""" |
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63 | return type(str("Enum"), (), dict(zip(sequential, sequential))) |
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64 | |||
65 | |||
66 | def parse(): |
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67 | """Parse arguments""" |
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68 | formatter = argparse.RawDescriptionHelpFormatter |
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69 | parser = argparse.ArgumentParser(description=sys.modules[__name__].__doc__, formatter_class=formatter) |
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70 | |||
71 | # fmt: off |
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72 | g = parser.add_mutually_exclusive_group() |
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73 | g.add_argument("--debug", "-d", action="store_true", default=False, help="enable debugging") |
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74 | g.add_argument("--no-ack", "-a", action="store_true", default=False, help="set for exabgp 3.4 or 4.x when exabgp.api.ack=false") |
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75 | g.add_argument("--silent", "-s", action="store_true", default=False, help="don't log to console") |
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76 | g.add_argument("--syslog-facility", "-sF", metavar="FACILITY", nargs='?', const="daemon", default="daemon", help="log to syslog using FACILITY, default FACILITY is daemon") |
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77 | g.add_argument("--sudo", action="store_true", default=False, help="use sudo to setup ip addresses") |
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78 | g.add_argument("--no-syslog", action="store_true", help="disable syslog logging") |
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79 | parser.add_argument("--name", "-n", metavar="NAME", help="name for this healthchecker") |
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80 | parser.add_argument("--config", "-F", metavar="FILE", type=open, help="read configuration from a file") |
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81 | parser.add_argument("--pid", "-p", metavar="FILE", type=argparse.FileType('w'), help="write PID to the provided file") |
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82 | parser.add_argument("--user", metavar="USER", help="set user after setting loopback addresses") |
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83 | parser.add_argument("--group", metavar="GROUP", help="set group after setting loopback addresses") |
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84 | |||
85 | g = parser.add_argument_group("checking healthiness") |
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86 | g.add_argument("--interval", "-i", metavar='N', default=5, type=float, help="wait N seconds between each healthcheck (zero to exit after first announcement)") |
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87 | g.add_argument("--fast-interval", "-f", metavar='N', default=1, type=float, dest="fast", help="when a state change is about to occur, wait N seconds between each healthcheck") |
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88 | g.add_argument("--timeout", "-t", metavar='N', default=5, type=int, help="wait N seconds for the check command to execute") |
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89 | g.add_argument("--rise", metavar='N', default=3, type=int, help="check N times before considering the service up") |
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90 | g.add_argument("--fall", metavar='N', default=3, type=int, help="check N times before considering the service down") |
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91 | g.add_argument("--disable", metavar='FILE', type=str, help="if FILE exists, the service is considered disabled") |
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92 | g.add_argument("--command", "--cmd", "-c", metavar='CMD', type=str, help="command to use for healthcheck") |
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93 | |||
94 | g = parser.add_argument_group("advertising options") |
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95 | g.add_argument("--next-hop", "-N", metavar='IP', type=ip_address, help="self IP address to use as next hop") |
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96 | g.add_argument("--ip", metavar='IP', type=ip_network, dest="ips", action="append", help="advertise this IP address or network (CIDR notation)") |
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97 | g.add_argument("--local-preference", metavar='P', type=int, default=-1, help="advertise with local preference P") |
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98 | g.add_argument("--deaggregate-networks", dest="deaggregate_networks", action="store_true", help="Deaggregate Networks specified in --ip") |
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99 | g.add_argument("--no-ip-setup", action="store_false", dest="ip_setup", help="don't setup missing IP addresses") |
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100 | g.add_argument("--dynamic-ip-setup", default=False, action="store_true", dest="ip_dynamic", help="delete existing loopback ips on state down and " "disabled, then restore loopback when up") |
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101 | g.add_argument("--label", default=None, help="use the provided label to match loopback addresses") |
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102 | g.add_argument("--start-ip", metavar='N', type=int, default=0, help="index of the first IP in the list of IP addresses") |
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103 | g.add_argument("--up-metric", metavar='M', type=int, default=100, help="first IP get the metric M when the service is up") |
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104 | g.add_argument("--down-metric", metavar='M', type=int, default=1000, help="first IP get the metric M when the service is down") |
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105 | g.add_argument("--disabled-metric", metavar='M', type=int, default=500, help="first IP get the metric M when the service is disabled") |
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106 | g.add_argument("--increase", metavar='M', type=int, default=1, help="for each additional IP address, increase metric value by M") |
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107 | g.add_argument("--community", metavar="COMMUNITY", type=str, default=None, help="announce IPs with the supplied community") |
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108 | g.add_argument("--extended-community", metavar="EXTENDEDCOMMUNITY", type=str, default=None, help="announce IPs with the supplied extended community") |
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109 | g.add_argument("--large-community", metavar="LARGECOMMUNITY", type=str, default=None, help="announce IPs with the supplied large community") |
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110 | g.add_argument("--disabled-community", metavar="DISABLEDCOMMUNITY", type=str, default=None, help="announce IPs with the supplied community when disabled") |
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111 | g.add_argument("--as-path", metavar="ASPATH", type=str, default=None, help="announce IPs with the supplied as-path") |
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112 | g.add_argument("--withdraw-on-down", action="store_true", help="Instead of increasing the metric on health failure, withdraw the route") |
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113 | |||
114 | g = parser.add_argument_group("reporting") |
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115 | g.add_argument("--execute", metavar='CMD', type=str, action="append", help="execute CMD on state change") |
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116 | g.add_argument("--up-execute", metavar='CMD', type=str, action="append", help="execute CMD when the service becomes available") |
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117 | g.add_argument("--down-execute", metavar='CMD', type=str, action="append", help="execute CMD when the service becomes unavailable") |
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118 | g.add_argument("--disabled-execute", metavar='CMD', type=str, action="append", help="execute CMD when the service is disabled") |
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119 | # fmt: on |
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120 | |||
121 | options = parser.parse_args() |
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122 | if options.config is not None: |
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123 | # A configuration file has been provided. Read each line and |
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124 | # build an equivalent command line. |
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125 | args = sum( |
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126 | [ |
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127 | "--{0}".format(l.strip()).split("=", 1) |
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128 | for l in options.config.readlines() |
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129 | if not l.strip().startswith("#") and l.strip() |
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130 | ], |
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131 | [], |
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132 | ) |
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133 | args = [x.strip() for x in args] |
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134 | args.extend(sys.argv[1:]) |
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135 | options = parser.parse_args(args) |
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136 | return options |
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137 | |||
138 | |||
139 | def setup_logging(debug, silent, name, syslog_facility, syslog): |
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140 | """Setup logger""" |
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141 | |||
142 | def syslog_address(): |
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143 | """Return a sensible syslog address""" |
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144 | if sys.platform == "darwin": |
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145 | return "/var/run/syslog" |
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146 | if sys.platform.startswith("freebsd"): |
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147 | return "/var/run/log" |
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148 | if sys.platform.startswith("netbsd"): |
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149 | return "/var/run/log" |
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150 | if sys.platform.startswith("linux"): |
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151 | return "/dev/log" |
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152 | raise EnvironmentError("Unable to guess syslog address for your " "platform, try to disable syslog") |
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153 | |||
154 | logger.setLevel(debug and logging.DEBUG or logging.INFO) |
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155 | enable_syslog = syslog and not debug |
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156 | # To syslog |
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157 | if enable_syslog: |
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158 | facility = getattr(logging.handlers.SysLogHandler, "LOG_{0}".format(syslog_facility.upper())) |
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159 | sh = logging.handlers.SysLogHandler(address=str(syslog_address()), facility=facility) |
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160 | if name: |
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161 | healthcheck_name = "healthcheck-{0}".format(name) |
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162 | else: |
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163 | healthcheck_name = "healthcheck" |
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164 | sh.setFormatter(logging.Formatter("{0}[{1}]: %(message)s".format(healthcheck_name, os.getpid()))) |
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165 | logger.addHandler(sh) |
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166 | # To console |
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167 | toconsole = hasattr(sys.stderr, "isatty") and sys.stderr.isatty() and not silent # pylint: disable=E1101 |
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168 | if toconsole: |
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169 | ch = logging.StreamHandler() |
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170 | ch.setFormatter(logging.Formatter("%(levelname)s[%(name)s] %(message)s")) |
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171 | logger.addHandler(ch) |
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172 | |||
173 | |||
174 | def loopback_ips(label, label_only): |
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175 | """Retrieve loopback IP addresses""" |
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176 | logger.debug("Retrieve loopback IP addresses") |
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177 | addresses = [] |
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178 | |||
179 | if sys.platform.startswith("linux"): |
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180 | # Use "ip" (ifconfig is not able to see all addresses) |
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181 | ipre = re.compile(r"^(?P<index>\d+):\s+(?P<name>\S+)\s+inet6?\s+" r"(?P<ip>[\da-f.:]+)/(?P<mask>\d+)\s+.*") |
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182 | labelre = re.compile(r".*\s+lo:(?P<label>\S+).*") |
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183 | cmd = subprocess.Popen("/sbin/ip -o address show dev lo".split(), shell=False, stdout=subprocess.PIPE) |
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184 | else: |
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185 | # Try with ifconfig |
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186 | ipre = re.compile( |
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187 | r"^inet6?\s+(alias\s+)?(?P<ip>[\da-f.:]+)\s+" |
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188 | r"(?:netmask 0x(?P<netmask>[0-9a-f]+)|" |
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189 | r"prefixlen (?P<mask>\d+)).*" |
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190 | ) |
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191 | cmd = subprocess.Popen("/sbin/ifconfig lo0".split(), shell=False, stdout=subprocess.PIPE) |
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192 | labelre = re.compile(r"") |
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193 | for line in cmd.stdout: |
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194 | line = line.decode("ascii", "ignore").strip() |
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195 | mo = ipre.match(line) |
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196 | if not mo: |
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197 | continue |
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198 | if mo.group("mask"): |
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199 | mask = int(mo.group("mask")) |
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200 | else: |
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201 | mask = bin(int(mo.group("netmask"), 16)).count("1") |
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202 | try: |
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203 | ip = ip_network("{0}/{1}".format(mo.group("ip"), mask)) |
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204 | except ValueError: |
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205 | continue |
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206 | if not ip.is_loopback: |
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207 | if label: |
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208 | lmo = labelre.match(line) |
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209 | if not lmo: |
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210 | continue |
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211 | if lmo.groupdict().get("label", "").startswith(label): |
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212 | addresses.append(ip) |
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213 | elif not label_only: |
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214 | addresses.append(ip) |
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215 | |||
216 | logger.debug("Loopback addresses: %s", addresses) |
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217 | return addresses |
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218 | |||
219 | |||
220 | def loopback(): |
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221 | lo = "lo0" |
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222 | if sys.platform.startswith("linux"): |
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223 | lo = "lo" |
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224 | return lo |
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225 | |||
226 | |||
227 | def setup_ips(ips, label, sudo=False): |
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228 | """Setup missing IP on loopback interface""" |
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229 | |||
230 | existing = set(loopback_ips(label, False)) |
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231 | toadd = set([ip_network(ip) for net in ips for ip in net]) - existing |
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232 | for ip in toadd: |
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233 | logger.debug("Setup loopback IP address %s", ip) |
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234 | with open(os.devnull, "w") as fnull: |
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235 | cmd = ["ip", "address", "add", str(ip), "dev", loopback()] |
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236 | if sudo: |
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237 | cmd.insert(0, "sudo") |
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238 | if label: |
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239 | cmd += ["label", "{0}:{1}".format(loopback(), label)] |
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240 | try: |
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241 | subprocess.check_call(cmd, stdout=fnull, stderr=fnull) |
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242 | except subprocess.CalledProcessError as e: |
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243 | # the IP address is already setup, ignoring |
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244 | if cmd[0] == "ip" and cmd[2] == "add" and e.returncode == 2: |
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245 | continue |
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246 | raise e |
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247 | |||
248 | |||
249 | def remove_ips(ips, label, sudo=False): |
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250 | """Remove added IP on loopback interface""" |
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251 | existing = set(loopback_ips(label, True)) |
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252 | |||
253 | # Get intersection of IPs (ips setup, and IPs configured by ExaBGP) |
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254 | toremove = set([ip_network(ip) for net in ips for ip in net]) & existing |
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255 | for ip in toremove: |
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256 | logger.debug("Remove loopback IP address %s", ip) |
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257 | with open(os.devnull, "w") as fnull: |
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258 | cmd = ["ip", "address", "delete", str(ip), "dev", loopback()] |
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259 | if sudo: |
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260 | cmd.insert(0, "sudo") |
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261 | if label: |
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262 | cmd += ["label", "{0}:{1}".format(loopback(), label)] |
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263 | try: |
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264 | subprocess.check_call(cmd, stdout=fnull, stderr=fnull) |
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265 | except subprocess.CalledProcessError: |
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266 | logger.warn( |
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267 | "Unable to remove loopback IP address %s - is \ |
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268 | healthcheck running as root?", |
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269 | str(ip), |
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270 | ) |
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271 | |||
272 | |||
273 | def drop_privileges(user, group): |
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274 | """Drop privileges to specified user and group""" |
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275 | if group is not None: |
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276 | import grp |
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277 | |||
278 | gid = grp.getgrnam(group).gr_gid |
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279 | logger.debug("Dropping privileges to group {0}/{1}".format(group, gid)) |
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280 | try: |
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281 | os.setresgid(gid, gid, gid) |
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282 | except AttributeError: |
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283 | os.setregid(gid, gid) |
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284 | if user is not None: |
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285 | import pwd |
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286 | |||
287 | uid = pwd.getpwnam(user).pw_uid |
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288 | logger.debug("Dropping privileges to user {0}/{1}".format(user, uid)) |
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289 | try: |
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290 | os.setresuid(uid, uid, uid) |
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291 | except AttributeError: |
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292 | os.setreuid(uid, uid) |
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293 | |||
294 | |||
295 | def check(cmd, timeout): |
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296 | """Check the return code of the given command. |
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297 | |||
298 | :param cmd: command to execute. If :keyword:`None`, no command is executed. |
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299 | :param timeout: how much time we should wait for command completion. |
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300 | :return: :keyword:`True` if the command was successful or |
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301 | :keyword:`False` if not or if the timeout was triggered. |
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302 | """ |
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303 | if cmd is None: |
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304 | return True |
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305 | |||
306 | class Alarm(Exception): |
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307 | """Exception to signal an alarm condition.""" |
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308 | |||
309 | pass |
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310 | |||
311 | def alarm_handler(number, frame): # pylint: disable=W0613 |
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312 | """Handle SIGALRM signal.""" |
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313 | raise Alarm() |
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314 | |||
315 | logger.debug("Checking command %s", repr(cmd)) |
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316 | p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, preexec_fn=os.setpgrp) |
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317 | if timeout: |
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318 | signal.signal(signal.SIGALRM, alarm_handler) |
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319 | signal.alarm(timeout) |
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320 | try: |
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321 | stdout = None |
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322 | stdout, _ = p.communicate() |
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323 | if timeout: |
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324 | signal.alarm(0) |
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325 | if p.returncode != 0: |
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326 | logger.warn("Check command was unsuccessful: %s", p.returncode) |
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327 | if stdout.strip(): |
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328 | logger.info("Output of check command: %s", stdout) |
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329 | return False |
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330 | logger.debug("Command was executed successfully %s %s", p.returncode, stdout) |
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331 | return True |
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332 | except Alarm: |
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333 | logger.warn("Timeout (%s) while running check command %s", timeout, cmd) |
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334 | os.killpg(p.pid, signal.SIGKILL) |
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335 | return False |
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336 | |||
337 | |||
338 | def loop(options): |
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339 | """Main loop.""" |
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340 | states = enum( |
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341 | "INIT", # Initial state |
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342 | "DISABLED", # Disabled state |
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343 | "RISING", # Checks are currently succeeding. |
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344 | "FALLING", # Checks are currently failing. |
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345 | "UP", # Service is considered as up. |
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346 | "DOWN", # Service is considered as down. |
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347 | "EXIT", # Exit state |
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348 | "END", # End state, exiting but without removing loopback and/or announced routes |
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349 | ) |
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350 | |||
351 | def exabgp(target): |
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352 | """Communicate new state to ExaBGP""" |
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353 | if target not in (states.UP, states.DOWN, states.DISABLED, states.EXIT, states.END): |
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354 | return |
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355 | if target in (states.END,): |
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356 | return |
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357 | # dynamic ip management. When the service fail, remove the loopback |
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358 | if target in (states.EXIT,) and (options.ip_dynamic or options.ip_setup): |
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359 | logger.info("exiting, deleting loopback ips") |
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360 | remove_ips(options.ips, options.label, options.sudo) |
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361 | # dynamic ip management. When the service fail, remove the loopback |
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362 | if target in (states.DOWN, states.DISABLED) and options.ip_dynamic: |
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363 | logger.info("service down, deleting loopback ips") |
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364 | remove_ips(options.ips, options.label, options.sudo) |
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365 | # if ips was deleted with dyn ip, re-setup them |
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366 | if target == states.UP and options.ip_dynamic: |
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367 | logger.info("service up, restoring loopback ips") |
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368 | setup_ips(options.ips, options.label, options.sudo) |
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369 | |||
370 | logger.info("send announces for %s state to ExaBGP", target) |
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371 | metric = vars(options).get("{0}_metric".format(str(target).lower()), 0) |
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372 | for ip in options.ips: |
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373 | if options.withdraw_on_down or target is states.EXIT: |
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374 | command = "announce" if target is states.UP else "withdraw" |
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375 | else: |
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376 | command = "announce" |
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377 | announce = "route {0} next-hop {1}".format(str(ip), options.next_hop or "self") |
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378 | |||
379 | if command == "announce": |
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380 | announce = "{0} med {1}".format(announce, metric) |
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381 | if options.local_preference >= 0: |
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382 | announce = "{0} local-preference {1}".format(announce, options.local_preference) |
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383 | if options.community or options.disabled_community: |
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384 | community = options.community |
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385 | if target in (states.DOWN, states.DISABLED): |
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386 | if options.disabled_community: |
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387 | community = options.disabled_community |
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388 | if community: |
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389 | announce = "{0} community [ {1} ]".format(announce, community) |
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390 | if options.extended_community: |
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391 | announce = "{0} extended-community [ {1} ]".format(announce, options.extended_community) |
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392 | if options.large_community: |
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393 | announce = "{0} large-community [ {1} ]".format(announce, options.large_community) |
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394 | if options.as_path: |
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395 | announce = "{0} as-path [ {1} ]".format(announce, options.as_path) |
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396 | |||
397 | metric += options.increase |
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398 | |||
399 | # Send and flush command |
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400 | logger.debug("exabgp: {0} {1}".format(command, announce)) |
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401 | print("{0} {1}".format(command, announce)) |
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402 | sys.stdout.flush() |
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403 | |||
404 | # Wait for confirmation from ExaBGP if expected |
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405 | if options.no_ack: |
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406 | continue |
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407 | # if the program is not ran manually, do not read the input |
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408 | if hasattr(sys.stdout, "isatty") and sys.stdout.isatty(): |
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409 | continue |
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410 | sys.stdin.readline() |
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411 | |||
412 | def trigger(target): |
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413 | """Trigger a state change and execute the appropriate commands""" |
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414 | # Shortcut for RISING->UP and FALLING->UP |
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415 | if target == states.RISING and options.rise <= 1: |
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416 | target = states.UP |
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417 | elif target == states.FALLING and options.fall <= 1: |
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418 | target = states.DOWN |
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419 | |||
420 | # Log and execute commands |
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421 | logger.debug("Transition to %s", str(target)) |
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422 | cmds = [] |
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423 | cmds.extend(vars(options).get("{0}_execute".format(str(target).lower()), []) or []) |
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424 | cmds.extend(vars(options).get("execute", []) or []) |
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425 | for cmd in cmds: |
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426 | logger.debug("Transition to %s, execute `%s`", str(target), cmd) |
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427 | env = os.environ.copy() |
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428 | env.update({"STATE": str(target)}) |
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429 | with open(os.devnull, "w") as fnull: |
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430 | subprocess.call(cmd, shell=True, stdout=fnull, stderr=fnull, env=env) |
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431 | |||
432 | return target |
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433 | |||
434 | def one(checks, state): |
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435 | """Execute one loop iteration.""" |
||
436 | disabled = options.disable is not None and os.path.exists(options.disable) |
||
437 | successful = disabled or check(options.command, options.timeout) |
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438 | # FSM |
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439 | if state != states.DISABLED and disabled: |
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440 | state = trigger(states.DISABLED) |
||
441 | elif state == states.INIT: |
||
442 | if successful and options.rise <= 1: |
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443 | state = trigger(states.UP) |
||
444 | elif successful: |
||
445 | state = trigger(states.RISING) |
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446 | checks = 1 |
||
447 | else: |
||
448 | state = trigger(states.FALLING) |
||
449 | checks = 1 |
||
450 | elif state == states.DISABLED: |
||
451 | if not disabled: |
||
452 | state = trigger(states.INIT) |
||
453 | elif state == states.RISING: |
||
454 | if successful: |
||
455 | checks += 1 |
||
456 | if checks >= options.rise: |
||
457 | state = trigger(states.UP) |
||
458 | else: |
||
459 | state = trigger(states.FALLING) |
||
460 | checks = 1 |
||
461 | elif state == states.FALLING: |
||
462 | if not successful: |
||
463 | checks += 1 |
||
464 | if checks >= options.fall: |
||
465 | state = trigger(states.DOWN) |
||
466 | else: |
||
467 | state = trigger(states.RISING) |
||
468 | checks = 1 |
||
469 | elif state == states.UP: |
||
470 | if not successful: |
||
471 | state = trigger(states.FALLING) |
||
472 | checks = 1 |
||
473 | elif state == states.DOWN: |
||
474 | if successful: |
||
475 | state = trigger(states.RISING) |
||
476 | checks = 1 |
||
477 | else: |
||
478 | raise ValueError("Unhandled state: {0}".format(str(state))) |
||
479 | |||
480 | # Send announces. We announce them on a regular basis in case |
||
481 | # we lose connection with a peer and the adj-rib-out is disabled. |
||
482 | exabgp(state) |
||
483 | return checks, state |
||
484 | |||
485 | checks = 0 |
||
486 | state = states.INIT |
||
487 | # Do cleanups on SIGTERM |
||
488 | def sigterm_handler(signum, frame): # pylint: disable=W0612,W0613 |
||
489 | exabgp(states.EXIT) |
||
490 | sys.exit(0) |
||
491 | |||
492 | signal.signal(signal.SIGTERM, sigterm_handler) |
||
493 | |||
494 | while True: |
||
495 | checks, state = one(checks, state) |
||
496 | |||
497 | try: |
||
498 | # How much we should sleep? |
||
499 | if state in (states.FALLING, states.RISING): |
||
500 | time.sleep(options.fast) |
||
501 | elif options.interval == 0: |
||
502 | logger.info("interval set to zero, exiting after the announcement") |
||
503 | exabgp(states.END) |
||
504 | break |
||
505 | else: |
||
506 | time.sleep(options.interval) |
||
507 | except KeyboardInterrupt: |
||
508 | exabgp(states.EXIT) |
||
509 | break |
||
510 | |||
511 | |||
512 | def cmdline(cmdarg): |
||
513 | sys.argv = [f'{sys.argv[0]} {sys.argv[1]}'] + sys.argv[2:] |
||
514 | main() |
||
515 | |||
516 | |||
517 | def main(): |
||
518 | """Entry point.""" |
||
519 | options = parse() |
||
520 | setup_logging(options.debug, options.silent, options.name, options.syslog_facility, not options.no_syslog) |
||
521 | if options.pid: |
||
522 | options.pid.write("{0}\n".format(os.getpid())) |
||
523 | options.pid.close() |
||
524 | try: |
||
525 | # Setup IP to use |
||
526 | options.ips = options.ips or loopback_ips(options.label, False) |
||
527 | if not options.ips: |
||
528 | logger.error("No IP found") |
||
529 | sys.exit(1) |
||
530 | if options.ip_setup: |
||
531 | setup_ips(options.ips, options.label, options.sudo) |
||
532 | drop_privileges(options.user, options.group) |
||
533 | |||
534 | # Parse defined networks into a list of IPs for advertisement |
||
535 | if options.deaggregate_networks: |
||
536 | options.ips = [ip_network(ip) for net in options.ips for ip in net] |
||
537 | |||
538 | options.ips = collections.deque(options.ips) |
||
539 | options.ips.rotate(-options.start_ip) |
||
540 | options.ips = list(options.ips) |
||
541 | # Main loop |
||
542 | loop(options) |
||
543 | except Exception as e: # pylint: disable=W0703 |
||
544 | logger.exception("Uncaught exception: %s", e) |
||
545 | sys.exit(1) |
||
546 | |||
547 | |||
548 | if __name__ == "__main__": |
||
549 | main() |
||
550 |